compaction summaries are split into structured slots that a fine-tuned small drafter generates in parallel; the target model verifies each line and repairs what it rejects. Across AppWorld and τ³ benchmarks with two target models it beat Hermes-style summarization by 2.04–5.63x, with an 8.68x median speedup in a Hermes user study — downstream performance trade-offs were model- and task-dependent, stated plainly in the paper.